Polyacrylamide hydrogels containing salt as electrolyte have been used as highly
stretchable transparent electrodes in flexible electronics, but those hydrogels are easy to dry
out due to water evaporation. Targeted, we try to enhance water retention capacity of
polyacrylamide hydrogel by introducing highly hydratable salts into the hydrogel. These
hydrogels show enhanced water retention capacity in different level. Specially,
polyacrylamide hydrogel containing high content of lithium chloride can retain over 70% of …